date_default_timezone_set
PHP function
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(PHP 5 >= 5.1.0, PHP 7, PHP 8)
Sets the default timezone used by all date/time functions in a script
Description
date_default_timezone_set(string $timezoneId): bool
date_default_timezone_set() sets the default timezone used by all date/time functions.
Instead of using this function to set the default timezone in your script, you can also use the INI setting date.timezone to set the default timezone.
Parameters
timezoneIdThe timezone identifier, like
UTC,Africa/Lagos,Asia/Hong_Kong, orEurope/Lisbon. The list of valid identifiers is available in the timezones.
Return Values
This function returns false if the timezoneId isn't valid, or true otherwise.
Examples
Getting the default timezone
php
<?php
date_default_timezone_set('America/Los_Angeles');
$script_tz = date_default_timezone_get();
$ini_tz = ini_get('date.timezone');
if (strcmp($script_tz, $ini_tz)){
echo 'Script timezone differs from ini-set timezone.';
} else {
echo 'Script timezone and ini-set timezone match.';
}